For the initial deployment, measurement machines should be located on LAN segments that display the following characteristics:

• Power should be 120VAC, humidity should be between 8% and 90% and room temperature should be between 50 and 90 degrees. The power circuit should be isolated and protected from surge-suppression. No more than 20A is required.

• The available bandwidth on the LAN segment should match or exceed that of the sites' Internet demilitarized zone (DMZ). While this is not a critical feature for one-way delay measurements, it will be important for later active measurements

• The measurement machine should be on a LAN segment as close to (if not part of) the DMZ as possible. The measurement machines are intended to measure the wide area network characteristics between sites. While it is important to capture the delay that is experienced on the DMZ, placing the measurement machine on LAN segments many segments from the DMZ will impact the accuracy of the IPPM measurements.

• If the measurement machine is placed on a LAN segment that is not the DMZ,avoid segments which are heavily congested with traffic not to or from the DMZ. Obviously, if the measurement machine must contend with unrelated network activity, the accuracy of the measurements will be impacted.

• The measurement machine should be placed in a physically secure location where it can function unattended. The standard security measures that apply for servers should also apply for the IPPM measurement machine. Please note that should the system fail for any reason, a complete replacement system will be shipped to replace it. Please make it possible for such "forklift"replacements to be done easily by the sites' staff.

• The measurement machine must be connected to a GPS antenna (which we will provide) with optimally 360-degree line-of-sight sky access. The GPS systems being used with IPPM measurement machines support lines between the measurement machine and antenna of up to 1,000 feet. The antennas themselves are no larger than 6- to 12-inches. While 360-degree line-of-sight sky access is not always possible or necessary, the accuracy of the measurement machine's synchronization may be impacted. The GPS antenna should be also be placed in such a manner that it is unlikely to be struck by lightening and can be easily replaced if destroyed by same. For more information on GPS antennas and GPS antenna placement for the GPS system, seeAntenna Installation Instructions

• An analog POTS (plain old telephone service) line must be available for out-of-band access to the measurement machine. This will primarily support troubleshooting and diagnosis of measurement machine failures. If you choose to provide the line from your site's telephone system, please be sure that the line is a direct inward dial line (i.e. can be directly dialed from anywhere on the planet). The line can and probably should be toll restricted, but must be able to dial 800 numbers.